JP6401355B2 - Seat frame for vehicle seat - Google Patents

Description

  The present invention relates to a seat frame for a vehicle seat.

  Conventionally, in a vehicle seat, a sub-frame extending in the width direction of the seat is disposed above and below so as to bridge between the left and right side frames of the seat back frame, and a substantially plate-like shape that supports the back of the seated person The thing which attached the resin plate to the up-and-down sub-frame via the rod is proposed (for example, patent document 1).

  In the seat back frame of Patent Document 1, since the resin plate is attached to the upper and lower subframes via the rods, the resin plate is pushed backward by the seated person's back at the time of the rear collision of the vehicle, and the seated person's back Can be supported.

JP 2011-105126 A

  However, in the invention of Patent Document 1, since the resin plate is attached to the upper and lower subplates via the rod as a structure for supporting the back of the seated person, the number of parts is large and the structure is complicated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat frame for a vehicle seat that can support a seated person's back during a rear-end collision with a simple structure. It is in.

The subject is a seat frame for a vehicle seat according to the present invention, which is a seat frame for a vehicle seat, and is arranged spaced apart in the width direction of the vehicle seat and extending in the vertical direction, and a pair of sides A seat back frame including a frame, an upper frame that connects upper ends of the pair of side frames, and a connection frame that connects the upper side of the pair of side frames so as to bridge the upper side of the pair of side frames, The upper frame portion provided with the pillar support portion for supporting the headrest pillar, and both end portions of the upper frame portion in the width direction are bent vertically and extended downward to be fixed to the side frame. An upper frame side part, and the connection frame is bent in a longitudinal direction of the connection frame, and stands from a surface formed by the connection frame. The folding projection that includes a position between the pair of side frames, the folding projection, the provided across the vertical direction of the length of the connecting frame, the top line of the bent projection Is provided so as to face the front inner side of the seat when viewed from the side of the upper frame, and the connection frame includes flange portions formed at an upper end portion and a lower end portion of the connection frame, and the width direction in the width direction. This is solved by providing an opening formed within a range where the flange portion exists.

As described above, the connecting frame is bent in the longitudinal direction of the connecting frame and includes a bent protrusion standing from the surface formed by the connecting frame at a position between the pair of horizontal frame parts. Since the part is provided over the entire length of the connecting frame in the vertical direction, the connecting frame receives the occupant's load and extends from the bent state at the time of rear-end collision of the vehicle. The center part in the seat width direction can move rearward, and the occupant can be moved to a position behind the seat as compared with the general use.
In addition, since the connecting part frame is connected so as to bridge the upper side of the horizontal frame part, the position close to the neck part on the back of the occupant can be made to approach the position behind the seat at the time of rearward collision of the vehicle, It is possible to reduce the distance from the headrest.

  At this time, it is preferable that the bent protrusion is provided in a range where both the upper frame side portion and the side frame exist in the vertical direction.

  At this time, it is preferable that the opening is provided in a range where both the upper frame side portion and the side frame exist in the vertical direction.

  At this time, it is preferable that the vertical length of the bent protrusion is longer than the vertical length of the opening.

  At this time, it is preferable that the opening is provided in a range where the bent protrusion is present in the vertical direction.

  At this time, the connection frame includes a back support portion disposed at the center of the connection frame in the width direction, and a pair of inclined portions disposed on both ends of the back support portion in the width direction. It is preferable that the bent protrusion is provided outside the inclined portion in the width direction.

  At this time, both ends of the connecting frame in the width direction are provided with connecting portions that are fixed to the side portions of the upper frame. It is preferable to be provided between the two.

According to the present invention, the connecting frame is bent in the longitudinal direction of the connecting frame, and has a folding protrusion standing from a surface formed by the connecting frame at a position between the pair of horizontal frame portions. Since the bent protrusion is provided over the entire length of the connecting frame in the vertical direction, it receives the load of the occupant during the rear collision of the vehicle, and the bent protrusion extends from the bent state. The central portion of the connecting frame in the seat width direction can be moved rearward, and the occupant can be advanced to a position behind the seat as compared with the general use.
In addition, since the connecting part frame is connected so as to bridge the upper side of the horizontal frame part, the position close to the neck part on the back of the occupant can be made to approach the position behind the seat at the time of rearward collision of the vehicle, It is possible to reduce the distance from the headrest.

1 is an external view of a vehicle seat according to an embodiment of the present invention. 1 is an external view of a seat frame of a vehicle seat according to an embodiment of the present invention. It is a perspective view which shows the edge part of the connection frame which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. It is explanatory drawing which looked at the connection location of the connection frame and upper frame which concern on one Embodiment of this invention from the seat back.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the vehicle seat S according to the present embodiment includes a seat back S1, a seat portion S2, and a headrest S3. The seat back S1 and the seat portion S2 are cushioned on a seat frame (not shown). The pads 1a and 2a are placed and covered with the skin materials 1b and 2b. The headrest S3 is formed by covering the core material (not shown) with the pad material 3a and covering with the skin material 3b, and is supported by the headrest pillar 14.

The seat back S1 mounts the cushion pad 1a on the seat back frame 1, is covered with a skin material 1b from above the cushion pad 1a, and supports the back of the occupant from the rear. As shown in FIG. 2, the seat back frame 1 includes a pair of side frames 20 that are spaced apart from each other and extend in the vertical direction, an upper frame 11 that connects the upper ends of the pair of side frames 20, and a lower end The frame is constituted by a lower frame 12 connecting the parts.
The upper frame 11 includes an upper frame portion 11a that extends in the seat width direction and forms the upper portion of the seat back frame 1, and an upper frame side portion 11b that is bent vertically at both ends of the upper frame portion 11a and extends downward. It consists of and. A pillar support portion 13 for supporting the headrest pillar 14 is provided on the upper frame portion 11 a of the upper frame 11.

  The side frame 20 is formed by pressing a sheet metal, and is formed of a substantially D-shaped substantially plate body in which a front end side is curved and a lower portion of the front end projects forward. As shown in FIG. 2, the substantially flat side portion 21, the front flange portion 22 formed by folding the front end portion of the side portion 21 inward in a U shape, and the rear end portion in an L shape inside the seat. And a rear flange portion 23 that is bent.

As shown in FIG. 2, the connection frame 30 is fixed by welding to the front inner surface of the left and right upper frame side portions 11 b.
The connection frame 30 is formed of a metal strip-like substantially plate body, is formed in a substantially flat surface in the center in the seat width direction, and a back support portion 31 that supports the back of the occupant and both ends of the back support portion 31 in the seat width direction. A pair of inclined portions 32 having a substantially flat surface with an acute angle with respect to the rear surface support portion 31, and provided on both ends of the pair of inclined portions 32 in the sheet width direction. And a narrow portion 35 that is narrower in the vertical direction than the inclined portion 32.
The connection frame 30 is curved between the back support part 31 and the pair of inclined parts 32. The inclined portion 32 supports the side portion of the occupant when the occupant is seated.
As shown in FIGS. 2 and 3, the rear surface support portion 31 and the inclined portion 32 have flange portions 33 formed by bending the upper end and the lower end along the extending direction of the rear surface support portion 31 and the inclined portion 32. Is provided. The back support part 31 and the inclined part 32 correspond to the wide part of the claims.

  As shown in FIGS. 2 and 3, the back surface support portion 31 and the inclined portion 32 are provided with a plurality of rectangular openings 34 at the center in the vertical direction. The opening 34 is provided for positioning a jig (not shown) used for weight reduction and welding of the connection frame 30.

The narrow part 35 is a band-like part narrow in the vertical direction provided at both ends of the connection frame, and includes a connection part 36 that connects the connection frame 30 to the upper frame side part 11b, a connection part 36, and an inclined part 32. And a bent projection 37 provided therebetween.
The connecting portion 36 is provided at the end of the narrow portion 35 on the opposite side of the inclined portion 32, and is fixed to the inner surface in front of the seat of the upper frame side portion 11b by welding. If sufficient space is secured behind the upper frame side portion 11b so that the connecting frame 30 bends backward, the connecting portion 36 may be fixed to the surface of the upper frame side portion 11b on the seat rear side. .

The bent protrusion 37 is a portion formed by bending the narrow portion 35 into a V-shaped cross section so as to protrude toward the inner front side of the seat. The bent protrusion 37 is erected with a height of about 5 mm from the surface of the narrow portion 35.
The bent protrusion 37 may be formed in a U-shaped cross section or a U-shaped cross-section, or may be bent forward by bending forward from the seat to protrude forward from the surface formed by the connecting portion 36. Folded in the opposite direction to protrude rearward from the surface formed by the connecting portion 36, and again bent in the reverse direction to the front of the seat to the surface formed by the connecting portion 36. You may form in a shape.
Further, the bent protrusion 37 is provided so that the bent width is substantially the same over the entire length of the narrow portion 35 in the vertical direction. The bending protrusion 37 may be formed such that the bending width is larger in the upper part than in the lower part.

The bent protrusion 37 is provided at a position with a predetermined distance from the opening 34. If the bent protrusion 37 and the opening 34 are too close, the bent protrusion 37 may be threaded. In this embodiment, the bent protrusion 37 has a predetermined distance from the opening 34. Therefore, the rigidity of the bent protrusion 37 is ensured.
Further, as shown in FIG. 4, the bent protrusion 37 is provided so as to be located on the inner side of the seat with respect to the upper frame side portion 11 b. The top line 37t of the bent protrusion 37 is provided so as to face the front inner side of the seat when viewed from the upper frame side portion 11b side. That is, a surface P2 that passes through the top line 37t and is perpendicular to the virtual surface P1 that connects the portions of the narrow portion 35 excluding the bent protrusion 37 is provided so as to face the front front side of the seat.

FIG. 5 shows a view of the connecting portion between the connecting frame 30 and the upper frame side portion 11b in FIG.
As shown in FIGS. 4 and 5, the rear flange portion 23 of the side frame 20 includes a cutout portion 23 s that is cut obliquely at the upper end of the end portion on the seat center side. By providing the cut-out portion 23s, the connection frame 30 and the rear flange portion 23 interfere with each other even during general use and when the bent protrusion 37 extends during the rear-end collision of the vehicle. There is no.

  In the present embodiment, during general use, as shown in FIGS. 3 and 4, the bent protrusion 37 maintains a V-shaped cross section. When a force pressing the occupant against the seat back S1 is applied, the bent protrusion 37 is deformed and extended so that the V-shape is widened. As a result, the connecting portion 36 bends backward, so that the occupant can enter a position behind the general use, and the distance between the occupant back surface and the headrest S3 can be reduced. These effects can be achieved with a simple configuration and a small number of parts.

P1 Virtual surface P2 Surface S Vehicle seat S1 Seat back S2 Seating portion S3 Headrest 1 Seat back frame 1a, 2a Cushion pad 1b, 2b Skin material 3a Pad material 3b Skin material 11 Upper frame 11a Upper frame portion 11b Upper frame side portion 12 Lower frame 13 Pillar support part 14 Headrest pillar 20 Side frame 21 Side part 22 Front flange part 23 Rear flange part 23s Notch part 30 Connection frame 31 Back support part 32 Inclination part 33 Flange part 34 Opening 35 Narrow part 36 Connection part 37 Bending protrusion 37t Top line

Claims (7)

A seat frame for a vehicle seat,
A pair of side frames provided spaced apart in the width direction of the vehicle seat and extending in the vertical direction;
An upper frame connecting the upper ends of the pair of side frames;
A connecting frame that connects the upper side of the pair of side frames so as to bridge, and has a seat back frame,
The upper frame includes an upper frame portion provided with a pillar support portion for supporting a headrest pillar, and both end portions of the upper frame portion in the width direction are vertically curved and extend downward to the side frame. A fixed upper frame side, and
The connecting frame is provided with a bent protrusion that is bent in the longitudinal direction of the connecting frame and is erected from a surface formed by the connecting frame at a position between the pair of side frames.
The bent protrusion is provided over the entire length of the connection frame in the vertical direction,
The top line of the bent protrusion is provided so as to face the seat front inner side when viewed from the side of the upper frame.
The connection frame is provided with a flange portion formed at an upper end portion and a lower end portion of the connection frame, and an opening formed within a range where the flange portion exists in the width direction. A seat frame for vehicle seats.   The seat frame for a vehicle seat according to claim 1, wherein the bent protrusion is provided in a range in which both the upper frame side part and the side frame exist in the vertical direction.   The seat frame for a vehicle seat according to claim 1 or 2, wherein the opening is provided in a range where both the upper frame side portion and the side frame exist in the vertical direction.   The seat frame of the vehicle seat according to claim 3, wherein the vertical length of the bent protrusion is longer than the vertical length of the opening.   5. The seat frame for a vehicle seat according to claim 4, wherein the opening is provided in a range where the bent protrusion is present in the vertical direction. The connection frame includes a back support portion disposed at the center of the connection frame in the width direction, and a pair of inclined portions disposed at both ends of the back support portion in the width direction,
The seat frame of a vehicle seat according to any one of claims 1 to 5, wherein the bent protrusion is provided outside the inclined portion in the width direction. At both ends in the width direction of the connection frame, a connection portion fixed to the side portion of the upper frame is provided,
The seat frame for a vehicle seat according to claim 6, wherein the bent protrusion is provided between the connecting portion and the inclined portion in the width direction.

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